Sierra Circuits Sierra Circuits (also known as Sierra Proto Express) is a company that manufactures and assembles printed circuit boards. | ![]() Schweizer Electronic Schweizer Electronic is a company that manufactures printed circuit boards (PCBs). | ![]() Unicircuit Unicircuit is a company that manufactures printed circuit boards for mission-critical, high-reliability, and time-sensitive products. | |
Founding Date | Founding Date 1986 | Founding Date 1849 | Founding Date 1979 |
Type | Type Private | Type Public | Type Subsidiary |
Tags | |||
Locations | Locations Sunnyvale, US HQ Delta, CA | Locations Schramberg, DE HQ Changzhou, CN Suzhou, CN Singapore, SG Wilmington, US | Locations Littleton, US HQ Littleton, US Littleton, US Santa Ana, US St. Louis, US |
Employees | Employees 478 | Employees 5043% decrease | Employees 213 |
Financial | |||
Revenue (est.) | Revenue (est.) $108m (Y, 2024) | Revenue (est.) €173.1m (FY, 2025) | Revenue (est.) N/A |
Operating ⚠ | |||
Industries Served | Industries Served 8 (Jun, 2024) | Industries Served 4 (FY, 2022) | Industries Served N/A |

Schweizer Electronic is a company that manufactures printed circuit boards (PCBs).
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Unicircuit is a company that manufactures printed circuit boards for mission-critical, high-reliability, and time-sensitive products.
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